Sparkles Dental Clinic, Lalapet, Secunderabad, Hyderabad, Telangana, India.
Department of Prosthodontics, Panineeya Institute of Dental Sciences, Hyderabad, Telangana, India.
J Med Life. 2021 Jan-Mar;14(1):61-67. doi: 10.25122/jml-2020-0085.
Typically, prosthodontists adjust ceramic restorations glazed surface by grinding prior to insertion. Such alterations of surfaces are necessary for the correction of occlusal interferences. We aimed to evaluate and compare the change in flexural strength of ceramic surfaces after re-glazing and polishing. This study included 40 samples of ceramic blocks that were fabricated and glazed, and then fired in accordance with the manufacturer's recommendations. The sample was randomly divided into four groups of 10 samples each. The first group was the control group with unaltered glazed samples. The second group was abraded with an extra-fine diamond bur followed by re-glazing, and the other two groups were polished with two commercially available polishing kits after abrading them with an extra-fine diamond bur. The samples were tested for their flexural strength using a universal testing machine. On the application of the F test on the means of all the groups, a value greater than 0.05 was found, which meant that there is no statistically significant difference in flexural strength values between the groups (P-value>0.05). Since the flexural strength values of the polished group were comparable to the other groups, polishing can be used instead of re-glazing for ceramic restorations. This reduces an additional clinical appointment for the patient and saves working time.
通常，修复医生会在插入前通过打磨来调整陶瓷修复体的上釉表面。这些表面的改变对于纠正咬合干扰是必要的。我们旨在评估和比较重新上釉和抛光后陶瓷表面的弯曲强度变化。本研究包括 40 个陶瓷块样本，这些样本经过制造和上釉，然后按照制造商的建议进行烧制。样本被随机分为四组，每组 10 个样本。第一组是未经处理的上釉样本作为对照组。第二组用超精细金刚石钻头打磨后重新上釉，另外两组用超精细金刚石钻头打磨后用两种市售的抛光套件进行抛光。使用万能试验机测试样本的弯曲强度。对所有组的平均值进行 F 检验，发现值大于 0.05，这意味着组间弯曲强度值没有统计学上的显著差异（P 值>0.05）。由于抛光组的弯曲强度值与其他组相当，因此可以用抛光代替重新上釉来处理陶瓷修复体。这为患者减少了一次额外的临床预约，并节省了工作时间。
